//package com.xiaoge.auth;
//
//import com.google.gson.Gson;
//import com.xiaoge.response.Result;
//import lombok.extern.slf4j.Slf4j;
//import org.apache.shiro.SecurityUtils;
//import org.apache.shiro.authc.AuthenticationException;
//import org.apache.shiro.subject.Subject;
//import org.apache.shiro.web.filter.authc.BasicHttpAuthenticationFilter;
//import org.apache.shiro.web.util.WebUtils;
//import org.springframework.http.HttpStatus;
//import org.springframework.stereotype.Component;
//import org.springframework.web.bind.annotation.RequestMethod;
//
//import javax.servlet.ServletRequest;
//import javax.servlet.ServletResponse;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import java.io.IOException;
//import java.io.PrintWriter;
//
//@Component
//@Slf4j
//public class JWTFilter extends BasicHttpAuthenticationFilter {
//
//
///**
//     * 认证之前执行该方法
//     *
//     * @param request
//     * @param response
//     * @param mappedValue
//     * @return*/
//
//
//    @Override
//    protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) {
//        Subject subject = SecurityUtils.getSubject();
//        return null != subject && subject.isAuthenticated();
//    }
//
///**
//     * 认证未通过执行该方法
//     *
//     * @param request
//     * @param response
//     * @return*/
//
//
//    @Override
//    protected boolean onAccessDenied(ServletRequest request, ServletResponse response) {
//        //完成token登入
//        //1.检查请求头中是否含有token
//        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
//        String token = httpServletRequest.getHeader("Authorization");
//        //2. 如果客户端没有携带token，拦下请求
//        if (null == token || "".equals(token)) {
//            responseTokenError(response, "Token无效，您无权访问该接口");
//            return false;
//        }
//        //3. 如果有，对进行进行token验证
//        JWTToken jwtToken = new JWTToken(token);
//        try {
//            SecurityUtils.getSubject().login(jwtToken);
//        } catch (AuthenticationException e) {
//            log.error(e.getMessage());
//            responseTokenError(response, e.getMessage());
//            return false;
//        }
//
//        return true;
//    }
//
// /*对跨域提供支持*/
//
//
//    @Override
//    protected boolean preHandle(ServletRequest request, ServletResponse response) throws Exception {
//        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
//        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
//        httpServletResponse.setHeader("Access-control-Allow-Origin", httpServletRequest.getHeader("Origin"));
//        httpServletResponse.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE");
//        httpServletResponse.setHeader("Access-Control-Allow-Headers", httpServletRequest.getHeader("Access-Control-Request-Headers"));
//        // 跨域时会首先发送一个option请求，这里我们给option请求直接返回正常状态
//        if (httpServletRequest.getMethod().equals(RequestMethod.OPTIONS.name())) {
//            httpServletResponse.setStatus(HttpStatus.OK.value());
//            return false;
//        }
//        return super.preHandle(request, response);
//    }
//
///* 无需转发，直接返回Response信息 Token认证错误*/
//
//
//    private void responseTokenError(ServletResponse response, String msg) {
//        HttpServletResponse httpServletResponse = WebUtils.toHttp(response);
//        httpServletResponse.setStatus(HttpStatus.OK.value());
//        httpServletResponse.setCharacterEncoding("UTF-8");
//        httpServletResponse.setContentType("application/json; charset=utf-8");
//        try (PrintWriter out = httpServletResponse.getWriter()) {
//            String data = new Gson().toJson(Result.error().code(4001).message(msg));
//            out.append(data);
//        } catch (IOException e) {
//            e.printStackTrace();
//            log.error(e.getMessage());
//        }
//    }
//}
